Improvement in rotary balanced cut-off valves



P sHELLENBAcK & F.BR|LMAYER.

-ntary Balanced cutof valves.

Patented M arch H, 1873.

UNITED STATES PATENT EEIcE.

PETER SHELLENBACK AND FERDINAND BRILMAYER, OF HAMILTON, OHIO.

IMPROVEMENT lN ROTARY BALANCED CUT-OFF VALVES.

Specification forming part of Letters Patent No. 136,622, dated March 11, 1873.

To all whom it may concern:

and FERDINAND BEILMAYER, of Hamilton,

Butler county, Ohio, have invented certain Improvements in Rotary Balanced Out-Oft' Valves, ot' which the following is a specification: Y

The iirst part of our invention consists ot' a rotary balanced cut-oft' valve, which is actuated by means ot' two bevel-wheels, one being Iixed upon the crank-shaft of the engine, the other upon the valve-shaft.

Figure 1 is a ,partly-sectional side view of one valve, actuating bevel-gears and reverse motion. Fig. 2 is a front view of cylinder and valve-chests, showing the ports and also the ilanges securing the valve-chest to the cylinder. Fig. 3 is an enlarged longitudinal section of the valve. Fig. 4 is a side view of the same.

a represents the bed-plate, upon which cylinder B is secured by screw-bolts. The valvechest c is of cylindrical and conical shape, and is provided with iianges r fr, by which it is secured to `cylinder B, as shown in Fig. 1. The valve d is hollow, and so constructed as to tit the taper of the valve-chest c steam tight. The valve d. is supported by and balanced upon the set-screw f, which is provided with ajam-nut, j, tor the purpose of adjusting. The valve d is provided with two grooves, 3 and 4, theone, communicating, through port 5, with space 'w of the valve d; the other, 4, through recesses 3, withthe openings in cylinder B and exhaust-pipe of steam-chest C, shown in Figs. 1 and 3. Groove 3 also communicates with the induct 6 in the valve-chest. The steam enters the valve d at 6, as indicat ed by the arrow. The ports in the valve-chest e are in line, as shown in Fig. 2. The ports y y in the valve d are in opposite ends of the valve, and therefore in revolvingl admit the steam alternately to cylinder B. The motion of valve d is attained by means of bevel-gears :v one being secured on the crank-shaft ot' the engine, the other on the valve-shaft 10. The recesses communicating with groove 4 are set at opposite ends, as shown at z z, and the groove 4 communicates with exhaust-pipe in chest C. When port y, at either end of valve d, is admitting steam to cylinder B the recess .c at the opposite end commences exhausting. The pinion on crankshaft q is secured thereto by key or set-screw, and the pinion on the valve-shaft l0 is provided with a slot, t', so as to allow the sleeve o, which is secured to the valve-shalt by means of setscrew t, to partly turn.

It will be seen that by turning the valveshaft, by means of hand-wheel 8, to either end oi' the slotfi inthe hub of pinionff, thelead of the valve will be changed and the motion of the engine reversed. Valve d is closed on both ends, and, it' found desirablefa stufngbox may be applied to the valve-cliest c.

XVe claim- The hollow rotary balanced cut-ott' valve d having induot-ports y y and exhaust-ports z z, in combination with valve: 'shaft 10, bevelwheels ff, and hand-wheel'all constructed and arranged for operation, substantially as and for the purposes set forth.

PETER SHELLENBACK. FERDINAND BRILMAYER.

Witnesses GEORGE C. SMITH, Trios. CLARK. 

